1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b51c35dc8c83c981d214d5c51a17df8c54235caeb5e5bf5a7458731677d6a8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c767d65-0a82-46ad-9bdd-2de50008ee44.json and https://artists.proofprofile.net/proofs/artist/3c767d65-0a82-46ad-9bdd-2de50008ee44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5086829747ceaa93b5ed1c89660d31b0fe5de606a886ecefdd1386fd8f113916. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7282392703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315fbb17cb11bd0002b0c690af8b3503872d467a017936b898a3ccb61407d7a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1930078.
Tình Yêu Đến Sau / Không Cần Phải Hứa Đâu Em (Mashup)
Thật Lòng Xin Lỗi Em (DJ Mr. Feel Remix)
Tình Yêu Đến Sau / Không Cần Phải Hứa Đâu Em (Mashup) [DJ Mr. Feel Remix]
Phạm Khánh Hưng's Greatest hits (Remix Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db85ed1fc84521471bce10803805dddc2ab49904fe3a35e9b051680f2c8e4ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA2F2302097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2266ce5a290efe72d5c8e323509458cd264bb3d148dd52378ffb7abaa7132. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA2F2400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4f5da5b25d6f8e0d3ac1eb4d9805d66b5ef000fe565c93ac3ad418dd0571c8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA2F2401695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef20c260d267bfdc85c1b0e3f2f986a7ea745f7c67d6a178e9a88d6b8e99f8b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1804319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c16563db0642df7358c83a2f8354addb74a68a64aa7aa25b7be05fa633bdb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/VNA0M1807191.